Dependence of f0F2 on solar-activity indices

Details Dependence of f0F2 on solar-activity indices Dependence of f0F2 on solar-activity indices

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ge%26ae..31..741k&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 31, July-Aug. 1991, p. 741-743. In Russian.

Physics

Diurnal Variations, F 2 Region, Radiant Flux Density, Solar Activity Effects, Solar Radio Emission, Solar Atmosphere, Solar Terrestrial Interactions, Ultraviolet Radiation

Scientific paper

An analysis of observational data indicates that the I(L-alpha) index (the mean diurnal solar radiation flux in the 121.6 nm line) is better correlated, on the average, with the critical frequency of the F2-layer (f0F2) than the traditional F10.7 index, and can be used as an input parameter in ionospheric models and predictions. It is also shown that I(L-alpha) values are delayed, on the average, by 1 day with respect to the F10.7 values, while variations of f0F2 are delayed with respect to both I(L-alpha) and F10.7 variations.

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